Berta baldtts



March 8, 1932. a. BALDUS, GEB DEDREUX 1,348,687

BUTTON IN TWO PORTIONS Filed July 29, 1930 Bum BALD/N. .9 Fil nv Y E NTO a;

Patented Mar. 8, 1932 UNITED STATES BERTA BALDUS, GEIB. DEDREUX, OF KARLSRUHE, GERMANY BUTTON IN TWO PORTIONS Application filed July 29, 1930, Serial No. 471,462, and in Germany July 8, 1929 Buttons made in halves, which are fastened together by means of a screw thread, are already well known and have the advantage that the cloth can be firmly pressed between Q the halves of the button, so that the cloth will not easily be split or torn out. They have, however, the disadvantage that, as a result of the rotation when screwing the parts together to fasten the button in position, the

cloth wrinkles and the buttons are not always secured in a reliable manner and prevented from coming loose by themselves.

In the case of other buttons, the halves of which are held together by a type of bayonet fastening, the same difliculty is present, viz. the cloth is only securely pressed between the two parts in the single (and therefore rare) instance where the thickness of the cloth happens to be just suitable for the proper distance between the two parts of the button.

Finally, it is not new to make buttonsln two halves with a screw thread, fitted with looking teeth, in which projections catch into the other half of the button. In this known type of button, however, the two halves are both on one side of the cloth, so that it is not possible to secure pressure on same.

The object of the present invention 1s to obviate the disadvantages of existing structures and this object is accomplished by providing one of the parts of a two part button with a projection having a slot designed to be engaged by a catch or latch carried by the other button part. The slot is preferably spiral with its lower wall toothed or serrated to be engaged by the catch.

One form of the invention is illustratively exemplified in the accompanying drawing which is a substantially transverse sectional view of a button fastened on a piece of cloth.

The base 1' of the button consists of a circular plate with a circular recess 2. In the.

9, which is designed to receive the projection 4. On the wall 10 of the cavity 9 is a catch 11 projecting inwards, so that it engages in the slot 5 when the projection 4 is inserted into and rotated in the cavity 9. At the base of the cavity 9 is a contracted spiral spring 12, which tends to press the projection 2 of the base 1 outwards.

The button is secured in the following manner: m I W A hole is first made in the cloth 13 with a pointed instrument e. g. a stiletto and the projection 4 of the inner base-portion is pushed through from the inside of the cloth. When this is accomplished, the projection at 5 is inserted in the cavity 9 and rotated until the catch 11 catches into the lower end of the spiral slot 5. The two halves of the button are then pressed tightly against each other, I against the action of the spring 12, which results in a slight turning of the halves of the button. The cloth 13 is thereby firmly pressed between the plates 1 and 7. On account of the arrangement of the locking teeth in the wall of the slot 5 remote from the plate '7 1 and as a result of the pressure of the spiral spring 12, the catch 11 locks into one of the teeth of the slot 5, so that the two halves of the button cannot come loose by themselves. Should it be desired to loosen the 30- two halves of the button, it is only necessary to press them tightly together, at the same time turning them in an anti-clockwise direction, when the catch 11 jumps out of the locking tooth with which it was engaged and 5 glides off on the wall of the slot (5) opposite the teeth without any hindrance. The recess 2 of the inside plate 1 of the button serves to take up any fringes, threads etc. which may be present.

Even though the two halves revolve slightly during the securing of the button, wrinkling of the cloth will not occur at all or but very slightly, as at the most the rotation would not be more than 180, whereas a number of revolutions are generally necessary to secure buttons provided with the ordinary screw thread.

The improved button can be secured extraordinarily firmly and well, irrespective of the thickness of the cloth. It can be applied and removed again most simply and without special effort and it presses the cloth so firmly between its two halves that splitting of the I cloth is hardly possible.

What I claim is: v r 1. A separable button, comprising a but ton part having a projection containing a spi ral slot a wall of which is serrated, a second button part having a cavity for reception of said projection and means engageable with the serrations of the slot wall for releasably interconnecting said button parts. i

2. A separable button, comprising a but- 7 w ton part having aprojection containing a spiral slot awallof which is serrated, a sec- 'ond'button part'having a cavity for receptionofsaid projection, a catch projecting fromthe wall of said cavity and engag-eable with the serrations of the slot wall and a coil signature.

"spring tending to force said button'parts in opposite directions to secure the catch in engagement with the serrations. In testimony whereof I hereunto aflix my I .BERTA BALDUS, E. DEDREUX. 

